From owner-freebsd-geom@FreeBSD.ORG Sun Oct 19 22:37:47 2008 Return-Path: Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EF4EE1065670 for ; Sun, 19 Oct 2008 22:37:47 +0000 (UTC) (envelope-from marius@nuenneri.ch) Received: from wa-out-1112.google.com (wa-out-1112.google.com [209.85.146.177]) by mx1.freebsd.org (Postfix) with ESMTP id D206D8FC12 for ; Sun, 19 Oct 2008 22:37:47 +0000 (UTC) (envelope-from marius@nuenneri.ch) Received: by wa-out-1112.google.com with SMTP id n4so848381wag.27 for ; Sun, 19 Oct 2008 15:37:47 -0700 (PDT) Received: by 10.114.148.2 with SMTP id v2mr4818366wad.173.1224455867058; Sun, 19 Oct 2008 15:37:47 -0700 (PDT) Received: by 10.115.89.3 with HTTP; Sun, 19 Oct 2008 15:37:47 -0700 (PDT) Message-ID: Date: Mon, 20 Oct 2008 00:37:47 +0200 From: "=?ISO-8859-1?Q?Marius_N=FCnnerich?=" To: freebsd-geom@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Subject: How to get the partition number of a GPT partition from the geom? X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 19 Oct 2008 22:37:48 -0000 Hi all, I'm currently experimenting with adding a geom_label for the GPT labels and uuid's. I'm not sure how to proceed because it's different to FS labels. I added g_label_gpt_taste() and changed some files according to the comment in g_label.c. Can I somehow determine which partion number cp->provider has? I already check that cp->provider->geom->class->name is equal to "PART". cp->provider->name is "md0p1" for example, do I really need to parse that string for the number? I need that number as an index into the partition table. Another thing: Can I call g_part_read() which is provided by the PART class to get the partition table of the geom or would I need to read and parse it on my own? Another idea: geom_part already provides a mechanism to get/set the label from userspace, would it be possible to use that mechanism from inside the geom_label? Thanks for your help Marius